Looking for a 300 mm zoom lens. As the KM 100-300 APO is quite expensive now on Ebay, I'm thinking about an alternative from Tamron (new about 140 €) or Sigma (new about 200 €).
IMHO the Tamron is an older design made for analog. Funnily it is only 436g vs. 530g for the Sigma. Probably Tamron brings a new version for digital soon.
There are different reports on the web about the Sigma. Some say it is sharp till 200 mm but gets worse above, others say, if you stop it down 1 or 2f it is pretty sharp still at 300 mm.
I've read close to nothing about the Tamron so far.
Can anyone comment on the lenses and probably compare them to the KM 100-300 APO?
Thanks,
Cecco
IMHO the Tamron is an older design made for analog. Funnily it is only 436g vs. 530g for the Sigma. Probably Tamron brings a new version for digital soon.
There are different reports on the web about the Sigma. Some say it is sharp till 200 mm but gets worse above, others say, if you stop it down 1 or 2f it is pretty sharp still at 300 mm.
I've read close to nothing about the Tamron so far.
Can anyone comment on the lenses and probably compare them to the KM 100-300 APO?
Thanks,
Cecco